Obsolete is a web series exploring the idea of what would happen to the current western-centric technological hegemony if aliens showed up one day and offered a cheap, powerful machine that could be used for both manual labor and combat to anyone willing to pay their price. As the title suggests, it would become obsolete. While there is a simmering conspiracy plotline lurking around in the background that links the various episodes together, it would probably be best to approach this as more of an episodic ‘what if’ kind of series with a military theme.
In Magia Record‘s case, it would probably be best to treat it as a stand-alone sidestory rather than as a technical sequel to Hangyaku no Monogatari. It nails the atmosphere and visual style… but stumbles pretty badly at the ‘making you care about its characters’ bit.
Oh, and if you decide to watch a fansubbed version, make sure to avoid any release that uses YameteTomete’s subs. Arbitrarily changing “Tamaki” to “Iroha” is just flat-out unacceptable. Gods only know what other bizarre alterations they made.